Observational studyInternational journal of molecular sciences2024
The 9 bp Deletion between the Mitochondrial COII and Lysine tRNA Genes in a Caucasian Population with Cognitive Disorders: An Observational Study.
Observational study in International journal of molecular sciences, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The loss of one of the two copies of the 9 bp tandem repeat sequence (CCCCCTCTA) located in the small non-coding region between the cytochrome oxidase II (COII) and the lysine tRNA genes in human mtDNA has been reported to be polymorphic in Asian, Oceanian and Sub-Saharan African populations, but it has rarely been observed in Europe. In this study, we will evaluate the possible association between the MIC9D polymorphism and cognitive disorders. A genetic analysis of unrelated Sicilian patients with cognitive deficits was performed to identify the 9 bp deletion MIC9D polymorphism. The MIC9D polymorphism was found in six patients, whereas this variant was absent in control individuals without cognitive deficits. The patients with the MIC9D polymorphism exhibited more complex clinical presentations; in particular, all had neuromuscular disorders and five also presented with behavioral disorders. The present study suggests a potential association between the MIC9D polymorphism and cognitive impairment with concurrent neuromuscular and behavioral involvement.
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